Cell Structure

9. a structure that helps cells maintain their shape and internal organization
10. separates the interior of the cell from the outside environment
12. small, slender, hair-like structures present on the surface of all mammalian cells
14. a minute particle consisting of RNA
15. a minute cylindrical organelle near the nucleus in animal cells
16. a small dense spherical structure in the nucleus of a cell during interphase.
18. A thin, helical, single-stranded filament of the cytoskeleton found in the cytoplasm of eukaryotic cells
20. a rigid layer of polysaccharides lying outside the plasma membrane
22. a long chain of protein subunit, as protein filament long chain of proteins, such as those found in hai
23. a cell organelle that helps process and package proteins and lipid molecules
24. part of a continuous membrane organelle in the cytoplasm of eukaryotic cells
25. a plastid that contains chlorophyll and in which photosynthesis takes place

1. protein-lined channel in the nuclear envelope
2. a small organelle present in the cytoplasm of many cells
3. a cell organelle that helps process and package proteins and lipid molecules
4. a slender threadlike structure, especially a microscopic appendage that enables many protozoa, bacteria, spermatozoa, etc. to swim.
5. an organelle found in both animal cells and plant cells
6. a membrane-bound organelle that contains the cell's chromosomes
7. a large vacuole found inside of plant cells
8. a small fluid-filled bladder, sac, cyst, or vacuole within the body.
11. the material of which the chromosomes of organisms other than bacteria (i.e., eukaryotes) are composed. It consists of protein, RNA, and DNA
13. membrane-bound organelles
17. a substance formed during a middle step of a chemical reaction between reactants and the desired product
19. the membrane found in all cells
21. an organelle found in large numbers in most cells